Fig. 1.

(Top) Schematic representation of the multiplexed fluorescence immunoassay and disposable assay cartridge. A protein microarray is printed to a plastic planar waveguide which is bonded to a plastic upper component to define a flow channel. Sample, wash, and detect reagents are introduced via a fluid inlet. Illumination of the assay surface is via the evanescent field generated down the length of the multimode waveguide. The array is imaged in a single field of view through the plane of the waveguide. (Bottom) MBio instrument and rack of assay cartridges.